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Factor completely x^4 +8x^2 -9

Factor completely x^4 +8x^2 -9
asked 85.9k views
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Factor completely
x^4 +8x^2 -9

asked
User Yuvaraj Loganathan
by
8.1k points

1 Answer

2 votes

x^4 +8x^2 -9=\\ x^4-x^2+9x^2-9=\\ x^2(x^2-1)+9(x^2-1)=\\ (x^2+9)(x^2-1)=\\ (x^2+9)(x-1)(x+1)
answered
User Jicking
by
8.2k points
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